package com.example.captcha.controller;

import cn.hutool.captcha.CaptchaUtil;
import cn.hutool.captcha.LineCaptcha;
import com.example.captcha.model.CaptchaProperties;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;
import java.util.Date;

@RequestMapping("/captcha")
@RestController
public class CaptchaController {
    private final static long session_valid_timeout = 60 * 1000;

    @Autowired
    private CaptchaProperties captchaProperties;

    @RequestMapping("/get")
    public void getCaptcha(HttpServletResponse response, HttpSession session){
        LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(captchaProperties.getWidth(), captchaProperties.getHeigth());
        //设置返回类型
        response.setContentType("image/jpeg");
        //禁止缓存
        response.setHeader("Progma","No-cache");
        //图形验证码写出，可以写出到文件，也可以写出到流
        try {
            lineCaptcha.write(response.getOutputStream());
            //存储session
            session.setAttribute(captchaProperties.getSession().getKey(),lineCaptcha.getCode());
            session.setAttribute(captchaProperties.getSession().getDate(),new Date());
            response.getOutputStream().close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    @RequestMapping("/check")
    public Boolean check(String inputCode, HttpSession session){
        //验证码生成的内容和用户输入内容进行比较
        if (!StringUtils.hasLength(inputCode)){
            return false;
        }
        //从session中获取信息
        String savedCode = (String) session.getAttribute(captchaProperties.getSession().getKey());
        Date saveDate = (Date) session.getAttribute(captchaProperties.getSession().getDate());
        if (inputCode.equalsIgnoreCase(savedCode)){
            //判断验证码是否过期
            if (saveDate != null && System.currentTimeMillis() - saveDate.getTime() < session_valid_timeout){
                return true;
            }
        }
        return false;
    }
}
